SoCalManche

So obviously I used the noid light to distinguish what we are saying is a pulsating dim light. Is there any other way to test the wiring besides that?

It won't FIRE in terms of everything being hooked up properly. Unless fuel is added to TBI. Correct.

That was the only thing I had, haha.

So there's two possible orientations on how to place the injector in the throttle body. Does the orientation matter?

You will love this. https://drive.google.com/open?id=14t9FgQ1lDAHVLMLw5rZvC8iV2UDPbyOR

If fuel injector is removed (I'm assuming keep it attached to harness when key ON), will fuel continue to flow since pressure won't establish? Just trying to have a game plan before I do this.

Yes, I can take a video if you want.

Yes. Regardless if fuel pump was connected directly at 12V via second battery, or connected through harness on normal setup (which hits 3-4V on crank), the engine acts like it wants to FIRE without pouring fuel in TBI, yet it will not catch and actually fire.

So just terrible grounding on top of what was already terrible grounding. Lol

So here is a video of it starting, everything hooked back up to normal, with same pump. Looks like the ISA is working properly now? Idle shoots through the room now before dying. https://drive.google.com/open?id=14qRsMq6PkL9HlcRitcJSioziefSfxxFN

So basically applying 12V directly or 3-4V through harness yield same results, so pump may be bad?

I have a spare I can go hook up to see. Even so, only 4V at FP connector with KEY ON; 3-something V when cranking.

Alright, I'll have to snag one tomorrow to check the spray pattern.

Can you elaborate on this point? I'm not following.

I do not. You think the timing is off?

Same thing occurs; Did not add fuel to TBI. Had someone else crank while I held the leads to my TJ's battery (disconnected from TJ, of course). She showed intermittent FIRING, not quite catching fully to gain full START. Same thing occurs if it is connected normally through the harness.

Okay, that's what I thought. Yes, I've done that test before and it fires right up. I will do it again. I was told in my thread about this a year ago that testing directly like that doesn't do anything. At least that's what was said.

But like I said, my only option currently is small jumper cables, and if you would like me to proceed, I'd need a little more idea of what exactly I'm doing. Where am I attaching to fuel pump?

Yessir.

No, just the jumpers. I have a smaller set of jumpers, but they aren't baby alligator clips or anything.

The pump is setup in the bucket like it would be in the tank. The connectors are not submerged in the gas, and the bucket top is sealed off besides where the fuel lines and wiring comes out. I can't tell if you're being facetious or not, but if you want me to run batt power to pump, I will.

The only "wires" I would have long enough to complete that task are jumper cables.

I took that page out of someone else's playbook on here. Can't remember where I saw it. Oops. I can pull the pump from the assembly and bench test via battery, if that's what you mean.

Any tests now that come to mind that may lead us to the issue?

I don't know. I had to return the fuel pressure gauge. I need to go buy a little one.